I dont know why he was late for school again.———why he was late for school again.前面有4个空

问题描述:

I dont know why he was late for school again.
———why he was late for school again.前面有4个空

i have no idea
我们英语老师说了的 i have no idea=i dont know

我觉应该是I do not know

(i have no idea) why he was late for school again